[postgis-users] Create a rotate() function?

[Paul Ramsey]

In the proj philosophy, things with go from lat/lon -> x/y is a  
projection and from x/y to lat/lon is an invprojection, but that's  
it.  An affine transform is a different beast.  I guess we do need to  
complete the set of transformation functions, with a rotation(), and  
then a full affine().  I like the idea of having scale(), translate 
(), rotate() around, for those who (like me) do not necessarily think  
in matrices about these issues.  But having an affine() as well would  
be good for those sophisticates who want to do several things at once.

On 10-Feb-06, at 6:36 AM, strk at refractions.net wrote:

> Rotation isn't something postgis should be doing IMHO.
> Same applies to scale, and translate, actually.
> Both operations are basically reprojections, so the correct
> way of handling them would be by using PROJ4.
> I'm not a PROJ4 expert, though.
>
> --strk;
>
> On Thu, Feb 09, 2006 at 03:11:59PM -0700, Bruce Rindahl wrote:
>> How do you request a new function?  I need a rotate function  
>> (similar to
>> the scale function).  I looked at the code and I could probably get
>> pretty close to what I need but I am running windows and don't  
>> have any
>> way to compile or test.
>> Thanks
>> Bruce Rindahl
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